EXTPOSE
Web page Timer icon

Web page Timer

Extension Actions

How to install an extension Open in Chrome Web Store
CRX ID
kokaoalgfplncknbadcfohacgndkaaaa
Description from extension meta

Simple timer for tab

Image from store
Web page Timer
Description from store

Simple timer for one specific tab. You can set timer and use web page, for example YouTube and then, after timer is done you will see pop-up, and you can either leave it or stay. It's made for just for fun. So timer will remind you about how much time did you spend on this tab.